php学习笔记

 1 cookie部分
 2 1.setcookie("user","xiangzishi110",time()+3600);//设置user的变量，有效期为3600秒
 3 2.setcookie("user","",time()-3600);//注销
 4 3.$_COOKIE["user"];//调用
 5 4 if(isset($_COOKIE["user"])){}//判断是否设置了user的cookie
 6 
 7 session部分
 8 1.<?php session_start();?>//在head前就需要调用session_start();
 9 2.$_SESSION["user"];
10 3.if(isset($_SESSION["user"])){}
11 4.unset($_SESSION["user"]);//释放user的session
12 5.session_destroy();//彻底终结session
13 
14 mysql语句
15 insert into article (title,content,id) value ('第一本',‘这个书很好看’，null)
16 select * from article order by id desc
17 delete from article where id=1
18 update article set title='第二本' where id=2
19 
20 数据库操作
21 mysql_fetch_array
22 mysql_fetch_assoc 返回关联数组
23 mysql_num_rows($result) 返回查询结果条数
24 mysql_unbuffered_query()
25 mysql_query()
26 mysqli_real_escape_string( $link,$GET['username'] )